Evaluation of the Oxidation Degradation Process of Biodiesel via 1H NMR Spectroscopy
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532020000801661 |
Resumo: | Biodiesel is a suitable alternative to replace the petro-diesel. The biodiesel is formed by unsaturated esters easily degraded by interferences of oxygen, temperature, contact with metals or contaminants. The aim of this research was to investigate the biodiesel degradation process via 1H nuclear magnetic resonance (NMR) spectroscopy, observing the olefinic, bis-allylic and allylic protons signals of the chemical bonds, and by the induction period of the Rancimat. Biodiesel samples with metallic ions (Fe and Cu) and with rosemary natural extract were analyzed. The metal compounds showed a catalytic effect in the samples and the rosemary natural extract showed to be efficient by retarding the degradation process. The extract was ineffective in the presence of iron. Through the 1H NMR spectra was possible to observe changes in the signal intensities of the olefinic, bis-allylic and allylic protons as well as the formation of oxidation products in the biodiesel in the degradation process. |
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Evaluation of the Oxidation Degradation Process of Biodiesel via 1H NMR SpectroscopyNMRbiodieseldegradationoxidationspectroscopyBiodiesel is a suitable alternative to replace the petro-diesel. The biodiesel is formed by unsaturated esters easily degraded by interferences of oxygen, temperature, contact with metals or contaminants. The aim of this research was to investigate the biodiesel degradation process via 1H nuclear magnetic resonance (NMR) spectroscopy, observing the olefinic, bis-allylic and allylic protons signals of the chemical bonds, and by the induction period of the Rancimat. Biodiesel samples with metallic ions (Fe and Cu) and with rosemary natural extract were analyzed. The metal compounds showed a catalytic effect in the samples and the rosemary natural extract showed to be efficient by retarding the degradation process. The extract was ineffective in the presence of iron. Through the 1H NMR spectra was possible to observe changes in the signal intensities of the olefinic, bis-allylic and allylic protons as well as the formation of oxidation products in the biodiesel in the degradation process.Sociedade Brasileira de Química2020-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532020000801661Journal of the Brazilian Chemical Society v.31 n.8 2020reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.21577/0103-5053.20200052info:eu-repo/semantics/openAccessMantovani,Ana Carolina G.Chendynski,Letícia ThaísGalvan,DiegoBorsato,DionísioMauro,Eduardo Dieng2020-07-23T00:00:00Zoai:scielo:S0103-50532020000801661Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2020-07-23T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Evaluation of the Oxidation Degradation Process of Biodiesel via 1H NMR Spectroscopy |
title |
Evaluation of the Oxidation Degradation Process of Biodiesel via 1H NMR Spectroscopy |
spellingShingle |
Evaluation of the Oxidation Degradation Process of Biodiesel via 1H NMR Spectroscopy Mantovani,Ana Carolina G. NMR biodiesel degradation oxidation spectroscopy |
title_short |
Evaluation of the Oxidation Degradation Process of Biodiesel via 1H NMR Spectroscopy |
title_full |
Evaluation of the Oxidation Degradation Process of Biodiesel via 1H NMR Spectroscopy |
title_fullStr |
Evaluation of the Oxidation Degradation Process of Biodiesel via 1H NMR Spectroscopy |
title_full_unstemmed |
Evaluation of the Oxidation Degradation Process of Biodiesel via 1H NMR Spectroscopy |
title_sort |
Evaluation of the Oxidation Degradation Process of Biodiesel via 1H NMR Spectroscopy |
author |
Mantovani,Ana Carolina G. |
author_facet |
Mantovani,Ana Carolina G. Chendynski,Letícia Thaís Galvan,Diego Borsato,Dionísio Mauro,Eduardo Di |
author_role |
author |
author2 |
Chendynski,Letícia Thaís Galvan,Diego Borsato,Dionísio Mauro,Eduardo Di |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Mantovani,Ana Carolina G. Chendynski,Letícia Thaís Galvan,Diego Borsato,Dionísio Mauro,Eduardo Di |
dc.subject.por.fl_str_mv |
NMR biodiesel degradation oxidation spectroscopy |
topic |
NMR biodiesel degradation oxidation spectroscopy |
description |
Biodiesel is a suitable alternative to replace the petro-diesel. The biodiesel is formed by unsaturated esters easily degraded by interferences of oxygen, temperature, contact with metals or contaminants. The aim of this research was to investigate the biodiesel degradation process via 1H nuclear magnetic resonance (NMR) spectroscopy, observing the olefinic, bis-allylic and allylic protons signals of the chemical bonds, and by the induction period of the Rancimat. Biodiesel samples with metallic ions (Fe and Cu) and with rosemary natural extract were analyzed. The metal compounds showed a catalytic effect in the samples and the rosemary natural extract showed to be efficient by retarding the degradation process. The extract was ineffective in the presence of iron. Through the 1H NMR spectra was possible to observe changes in the signal intensities of the olefinic, bis-allylic and allylic protons as well as the formation of oxidation products in the biodiesel in the degradation process. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-08-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532020000801661 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532020000801661 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.21577/0103-5053.20200052 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.31 n.8 2020 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318183113293824 |